/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/declarationEmitOptionalMethod.ts ===
declare function AssertType(value:any, type:string):void;
export const Foo = (opts: {
AssertType(Foo, "({    a?(): void;    b?: () => void;}) => {    c?(): void;    d?: () => void;}");
AssertType((opts: {    a?(): void,    b?: () => void,}): {    c?(): void,    d?: () => void,} => ({  }), "({    a?(): void;    b?: () => void;}) => {    c?(): void;    d?: () => void;}");
AssertType(opts, "{ a?(): void; b?: union; }");

    a?(): void,
AssertType(a, "union");

    b?: () => void,
AssertType(b, "union");

}): {
    c?(): void,
AssertType(c, "union");

    d?: () => void,
AssertType(d, "union");

} => ({  });
AssertType(({  }), "{}");
AssertType({  }, "{}");


